Stop-motion for high-speed machines.



No. 818,159. PATENTED APR.1'7, 1906. W. E. GOODYEAR.

STOP MOTIOB FOR EIGH SPEED MACHINES.

APPLIGATIDN FILED MAY 2'7, 1905.

3 SHEETSSHEET 1.

Attorneys.

No. 818,159. PATENTED APR.1'7, 1906.

I w. E. GOODYEAR.

STOP MOTION FOR HIGH SPEED MACHINES.

APPLICATION FILED MAY 27, 1905.

' 3 SHEETSSHEET 2 W1 HIESCS in Van tor v I Attdmeys.

PATENTED APR. 17, 1906. W. E. GOODYEAR. STOP MOTION FOR HIGH SPEED MACHINES.

APPLICATION FILED MAY 27, 1905.

3 SHEETSSHEET 3.

I11 ventor W8 Attorneys.

Witnesses UNITED STATEb PATENT @IFFIUF...

STQP=WIQTEQN POP kllGH SPEED MACHlNES.

Specification of Letters Patent.

I Patented April 17, 1906.

Application filed May 27.1905. $erial 110. 262.551.

To all whom it may concern:

a predetermined position and without shock.

The invention is intended for use in connection with sewing-machines, and particularly buttonhole sewing machines, which must be stopped in a certain and definite position. The invention, however, may be. applied to other forms of machinery, as is found desirable.

I attain the objects of my invention by the mechanism illustrated in the accompanying drawings, in which Figure 1 is a side elevation of a sewing-machine fitted with the stop-motion embodying my invention. Fig. 2 is an end view thereof, the parts being in the stop or locked position. Figs. 3 and 4 are portions of the same mechanism illustrated in Figs. 1 and 2 and showing the parts in the position they assume when the sewing-machine is running at full speed. Figs. 5 and 6 are similar views showing the parts in the position they assume when the sewing-machine is running at reduced speed.

Fig.7 is an enlarged side view for the purpose of more clearly showing the details of construction of the mechanism. Fig. 8 is a section on the lines 8 S of Fig. 7; andFig. 9 is a view similar to Fig. 7, but seen from the other side. Fig. 10 is a detailed view of the driving-pulleys and internal gears, taken on the sectional lines 10 10 of Fig. 11. Fig. 11 is a transverse section taken on the lines 11 11 of Fig. 10. Fig. 12 is a side elevation of a portion of the mechanism, showing a modification; and Fig. 13 is a sectional view taken on the lines 13 13 of Fig; 12.

In all of the views like parts are designated by the same reference characters.

I will describe my invention as applied to a buttonhole-sewing machine; but it is to be expressly understood that this especial embodiment is solelyfor purposes of i1 ustration.

The machine illustrated is similar to that disclosed in the patent to E. E. Allen, No. 785,061, patents March 14, 1905, with the exception of the stop-motion. It is to be understood that the illustration of this particular sewing-machine is solely for the purpose of describing the invention, as the invention of the stop-motion may be applied to any other form of sewing-machine or to any machine to which the stop-motion may be used with advantage.

In Fig. 1 the main shaft of the sewing-niachine is shown in dotted lines and indicated by the character 1. The shaft is driven by the belt 2 by means of the two ulleys 3 and 4. A cam 5, carriedby a disf: 6, which is turned by the machine and which makes one pleted, is provided. This cam is designed to engage with mechanism for shifting the ing the stop-motion.

The construction of the two illustrated in Figs. 10 and 11. 3 is loosely mounted upon a sleeve 7, which is turned with the shaft 1 by being keyed thereto by the pin 8. A collar 9 prevents the pulley from moving sidewise. The second pulley 4 is loosely journaled upon the shaft 1 andis retained in place by means of a screw 10. The sleeve 7 is provided with a flange 11, carrying studs 12. Upon these studs are mounted pinions 13 and 14, two sets of pinions being illustrated. The pinions are secured together so as to rotate at the same plulleys .is T e pulley be desired. As}.shown in the drawings, each of the pinions '14 is nearly twice the size of the pinions 13. The pinions 13 mesh with. an internal gear15, secured to the pulley 3, and the pinions 14 mesh with a pinion 16 carried by the hub of the pulley 4.- .The periphery of the pulley 4 is provided with a groove 17 and has formed, upon it one wall of a roove 18, the other wall of the groove 18 eing' formed upon the pulley 3. The two grooves are of the same diameter, so that a single belt may be shifted from one groove to the other as "required.

The collar 9 is provided with a finger 19, (see Fig. 8,) and this finger may be engaged size as may the latter is moved within the sphere of rotation of the finger. 22 and has a depending finger 23 and an arm 24. The arm 24 connects through a chain or cord 25 to the pedal (not shown) for starting the stop-motion. The finger 23 is provided with a notch on its depending extremity, forming the two steps 26 and 27. The finger revolution while a buttonhole is being com.-

speed, and they bear a-certain relation as to The arm 21 is pivoted at belt from one pulley to the other and apply- I with a notch 20, carried by an arm 21, when 23 is adapted to be engaged with a second finger or stop 28, carried by a shaft 29. U on the shaft 29 is a third finger 30, whic is adapted to be engaged by the cam and the 5 shaft 29 oscillated and the finger 28 moved to engage with either of the stops 26 27 as desired.

A strong spring 31 de resses the finger 23 and normally tends to ,fibrce the arm 21 -in-' ward and cause-the notch 20, toengage with the stop 19 unless it is otherwise prevented. Carried hp the arm 21 is a pin 32,, which engages wit a slot 33, formed in a belt-shift l ever 34. The slot 33 is shaped, as shownin Fig. 7, with a vertical portion and an inclined portion, as shown. The pin 32 engaging Within the slot by its reciprocation and owing to the configuration oftheslot will move the the'beltfrom one pulley to the other.

The pulley 3 is provided with a cylindrical end of the, spring9lis curved at 41 outward and then is shirply bent in at 42, forming an angular portion 43. This spring is adapted to e engaged by aroller-'or pin 44,; carried by the arm 21. U onthe arm21 being moved gage'with the's ring 39, moving it upward andforcing the rake-shoe into contact with the drum 35. The spring 39 permits elastic o connection b ween the roller 44 and the brake-shoe. he brake-shoe is disengaged from contact with the drum by gravity.

2].Insteadof the brake-shoe and drum (illusl *tratedin. Figs. 7, 8, and 9) apawl and ratchet .4' 'similar to that illustrated in Figs. 12 and 13 ;-may beemployed. 1h this modification the 'aim37 is provided with a sharp point 45,. bonstituting a pawl, and the drumis ro-.

vided with-teeth 46, constituting a rate et.

By this construction the action of the pawl and ratchet will be more certain than the brake shoe previously described. In Fig. 12

the pulleys 3 and 4 are shown as adapted for psewith a flat belt instead of the roundone illustrated in connection with the other views.

The peripheries of the two pulleys are nearly flat, so that the belt will properly engage with them.-

The operation oi the com lete device is as:

dellows: The belt 2 is norms 1y engaged with the pulley 4 and'is presumed to be constantly moving. The parts before the starting .in operation of the sewing-machine are in the position shown iILFigs. 1 and 2. The finger 30 will be supported upon the cam 5, and the 1 the pulley 3 to rotate. turned constantly in one direction will turn the pinions 13 W1 1 turn them in the same dibe'lteshift lever in such amanner as to shift 1 I move insequence with the spring. Thefree outward the 9 er 44 will be causedto en- I ried by the studs 12, which are mountednpon depressed and the lever 21 moved away from crease used, to be disengaged from contact with the drum 35 or ratchet 46, thus permitting The pulley 4 being the pinion 16 in the same direction and the latter meshing with the pinions 14 will have a tendency to turn them in the opposite di- 'rection. These inions being connected to rection, and the pinions l3 meshing with the internal gear 15 will turn it in the same direction or opposite to the direction of rotation of the pinion 16. The :result will be that the pulleys 4 and 3 will rotate in oppo sitedirections and the sleeve 7 will remain stationar and the main shaft 1 will not revolve. v pen the pedal being de ressed through the a ency of the cord or c ain 25 the lever 24 wi 1 be de ressed, the ar1n-2f're tracted, and the note 20. disengaged from the projection 19. The movement of the in 32 within the slot 33 .will oscillatethe cit-shifting lever 34 and shift the belt to. the groove 18, iormed betWeenthefpulleys'fiS and 9 5' 4. The belt will engage equally on" both sides of the groove 18, tending to'turn both pulleys in-the same direction. 1 The pulley 3, with the internal car 15, will tend to rotate the pinion r.,13" in t e opposite direction, the pinion 13 turning the pinion 14 at the same rate of s eed and meshing with the pinion 1'6 will ten to turn that in the OPPOSIlJB diIGO- tion. The pinion 16,however,-bein carried by the pulley 4 will be rotated at t e same speed and in the same direction as the pulle 3. Consequently the pinions B and 14 wil be bodily turned in the same direction as the two pulleys 3 and 4. The pinions being carthe sleeve 7, will rotate that inthe same direction and with it the shaft 1'. The engagement of the roller- 44 with the inclined por tion 42 of the spring 39 will elevate the brake-arm 37 and cause the brake-shoe 36 or pawl 45; as depends upon the character of the machine, to momentarily engage with the drum 35 or ratchet 46, stopping such drum for an'instant, as the lever 24 is being I20 the collar 9 to the disengaged position. As soon as-the roller 44 rides over the point of the bent ortion 42 of the spring 39 and engages with the inclined portion 43' the brakeshoe or pawl will be disengaged from the drum orratchet. Theparts will be engaged together a length of time, however, to sto the pulley 3. The result of this action W1. 1' be to slowly start the shaft 1.; This action 1s as follows: The pulley 4 being turned con- 13 IOC' stantly in one direction will turn the pinion 16 in the same direction. Such pinion meshing with the pinion to turn it in the opposite direction. The pinion 14 being connected to the pinion 13 will turn it in the same direction, and such pinion meshing with the internal gear will tend to turn it and the pulley 3 in the same direction or in a direction opposite to the pulley 4. The pulley 3 being prevented from rotating at this point by the action of the brake or pawl, the pi'nions '13 will turn upon the internal gear 15, which is temporarily stationary. The result will be that the sleeve 7, which carries the pinions, will be rotated in the same direction as the pulley 4, but at a much less rate of speed. As shown in Figs.

10 and 11, the parts are so proportioned as to rotate the sleeve 7 at about one-quarter of the rate of speed of the pulley 4; but this ratio may be varied as desired. This will start the machine and will cause it to turn the disk 6 in the direction of the arrow, al-

.They will continue as before and in the same direction.

lowing the finger 30 to drop from engagement with the earn 5 and ipermittin the finger 28 to engage with the ee end 0 the finger 23 and rest upon the steps 26. The parts will now be in the position shown in Figs. 3 and 4. to move and actuate the sewing-machine at a maximum speed until the disk 6 has made nearly a complete revolution. As soon as the lower portion of the cam 5 engages with the finger 30 it will elevate it a sufficient distance to cause the finer 28to become disengaged from the step 26 and fall into the step 27. T1 is will move the pin 32 down the inclined portion of the slot 33, actuating the belt-shifter and moving the belt from the groove 18 to the groove 17. At the same time the roller 44 engages with the inclined portion 43 of the spring 39 and will oscillate the latter and raise the arm 37, causing the brakeshoe 36 or pawl 45 to engage with the drum 35 or ratchet 46. This will stop the movement of the pulley 3. The belt beingin the groove 17 of the pulley 4, the latter will be rotated at the same rate of speed This through the intermediary of the pinion 16,

small gears 14 and 13, and internal gear 15,

which is now stationary, will .tend to rotate the sleeve 7 at a slow rate of speed and in the same direction as before, as has already been described. The shaft 1 will now be rotated at about one-quarter of its normal speed and will continue to rotate a certain definite number of revolutions until the disk 6 so moves the cam 5 as to cause the finger 30 to engage with the second incline and be elevated. This will disengage the finger 28 from the step 27 and permit the finger 23 to drop downward, this movement being assisted by means of the spring 31. The pin 32, sliding within the vertical portion of the slot 33, will not move the belt-shifter but the arm 21, carry- 14 will have a tendency,

in g the notch 20, will move in the path of the projection 19 and upon the ing a complete revolution. The projection will engage with the notch and. the collar and shaft will be definitely and positively stopped. At the same time th oller 44 will slip by the angular portion 42 of the spring 39 and engage beyond the inclined surface 41, permitting the lever 37 to drop and disengage the brake-shoe or pawl; with the drum or ratchet. This will permit the pulley 3 to then rotate, which it willcontinue to do in the opposite direction from the pulley 4, the pinions 13 and 14 revolving idly and the sleeve 7 remaining stationary. By this means the machine may be gradually started and positively stopped; but before stopping its speed will be reduced so that the action of stopping will be without shock.

The mechanism may be modified as desired, so as to make it applicable to other machinery in which stop-motions are of use.

'Having described my invention, what I claim as new, and desire to secure by Letters Patent, isfi .1. A stop-motion, wherein means are employed for automatically reducing the speed of the machine before stopping it, such means being controlledby the machine, and means for positively driving it at a reduced speed to a predetermined stopping position.

2. A stop-motion, wherein means are employed to automatically reduce the speed of the machine before stopping it, and to continue the engagement of the driving power collar 9, makafter the speed is reduced, such means being controlled by the machine.

3. In a stop-motion, the combination with a driven shaft, of means for driving the shaft at high s eed, means for positively and automatica ly driving the shaft at a reduced speed, such-means being controlled by the driven shaft, and means for positively stopping the shaft. 7

4. In a stop-motion, the combination with a driven shaft, of ,means for positively driving the shaft at high speed, of means for positively and automatically driving the shaft at a reduced speed, to a predetermined stopping position, such. means being con trolled by the driven shaft, and means for positively stopping the shaft.

5. In a stop-motion, the combination with a driven member, of means for positively driving the member at hi h speed, such means being disengageable, 0 means for stopping the driven member, such means comprising means for automatically operating the driven member at a reduced speed, such means being controlled by the driven member, and means for positively stopping the driven member.

6. In a stop-motion, the combination with a driven member, means for driying the member at high speed, and a positive stop,

and means for automatically driving the driven member at a reduced speed, such.

means being controlled by the driven member, and means for applyingthe stop after the driven member has been moved to a predetermined stopping position.

7. A stop-motion having means for automatically reducing the speed of a machine a predetermined number of revolutions before stopping it, and to positively drive the machine a predetermined number of revolutions after the speed is reduced.

8. A stop-,motion having means to auto- I matically reduce the speed of a sewing-machine, after making a predetermined group of stitches, and to continue the engagement of the driving power after the speed isreduced.

9. In a stop-motion, the combination with a driven shaft, a stop therefor, a plurality of driving-pulleys, a single belt therefor, gear- 1 ing between thedriving-pulleys and the shaft,

and means for shifting the belt and applying the stop, whereby the speed of the shaft will I positively driven g j shaft.

be reduced, and it will be at such reduced speed.

10. In a stop motion, the combination 5 with mechanism to drive a machine at differ- E a belt, and means for causing the belt to engage with one-pulley, or with both and means for stopping the shaft.

13. In a stop -motion, the combination with a driven shaft, a sleeve thereon, pinions .carried by the sleeve, a plurality of pulleys turning upon the shaft, and carrying-gears engagin'g with the pinions, means for rotat ing the pulleys, and means for stopping one of said pulleys, and meansfor preventing rotation of the shaft. v

14. In a stop -motion, the combination with a shaft, two pulleys thereon, the'said pulleys turning loosely upon the shaft, gears upon the pulleys, a sleeve upontl e shaft and rotating therewith, pinions carried by the sleeve and engaging with the gears upon the pulleys, means for rotating the pulleys, means for preventing rotation of one of the pulleys,

and means for preventing rotation of the,

shaft.

15. In a stop -motion, the combination with a shaft, a plurality of pulleys thereon, positive gearingeonnecting the pulleys to the shaft, means-forf'rotatingthe pulleys, means pulleys ing with the larger of the two pinions on the for preventing rotation of one of the pulleys, and means for preventing rotation of the shaft.

16. In a stop-motion, the combination with a shaft, two pulleys thereon, gearing connecting the pulleys to the shaft, means for driving one or both of the pulleys, means for preventing rotation of one of the pulleys, and means for preventing rotation of the shaft.

17. In a stop-motion, the combination with a shaft, two pulleys thereon, gearing connecting the pulleys to the shaft, a belt,

pulley or both pulleys, means for preventing rotation of one of the pulleys, and means for preventing rotation of the shaft.

18. In a stop -motion, the combination with a shaft, a sleeve thereon, two pinions of different sizes carried by the sleeve, two pulleys turning freely upon the shaft and carryand means for driving one or both of leys and means for preventing rotation of the 19. In a stop-motion, the combination with a shaft, a sleeve thereon and rotating therewith, the said sleeve carrying a large and a small pinion, two pulleys turning freely upon the shaft, gears on the pulleys, the said gears engaging with the pinions, means for driving one or both'of the pulleys, and means for preventing rotation of one of the pulleys and means for-preventing rotation of the shaft.

20. In a stop motion, the combination with a shaft a sleeve thereon and turnintherewith, tlie said sleeve carrying a smal and a large inion, two pulleys ournaled ,one of-said pulleys carrying a pinion engagsleeve, and the other plulley carr 'ng an internal gear engagingwit the smal er of the pin-.

pulleys, and means for preventing rotation of one of thepulleys and means for preventing rotation of the shaft.

v21. In a stop-motion, the combination with a driving-shaft, a cam moving in time therewith, means for positively rotating the shaft at the working speed, means for positively rotating the shaft at a slower speed, and means for stopping the shaft, the last two means being controlled by the movements of the "cam.

22. In a sto' -motion, the combination with a drivens aft, a cam moving in time therewith, means for rotating the shaft at the working speed, said means comprising two ulleys, gearing interposed between theuleys and the shaft, a driving-belt, means for shifting the belt from one pulley to engage with both pulleys, and a positive stop for the means for causing the belt to engage with one ing gears engaging with the pinions, means for preventing rotation of one of the plulleys t e pul-' upon the sha t and'turning freely thereon,

ions, means for driving one orbotlii of the eiaiee shaft, the said belt being shifted and the posi tive stop applied by mechanism controlled by the cam.

23. In a stop-motion, the combination with a driven shaft and a caminoving in time therewith, of a sleeve carried by the driven belt, and carrying pinions, two pulleys loosely journaled .upon the driven shaft,

and carrying gears engaging with the pinions, a driving-belt, means for shifting the belt from one pulley so as to cause it to run upon both pulleys, a brake to prevent rotation of one of the pulleys, and a positive stop for the shaft, the said belt-shifting device, brake and stop being actuated by mechanism controlled by the cam. g 24. In a stop motion, the combination with a driven shaft and a cam rnovin in time therewith, a sleeve upon the driven shaft carrying pinions, two pulleys loosely journaled upon the shaft and carrying gears which engage with the pinions, a drivin belt engaging with the pulleys, a belt-s ter for causing the belt to engage with one or both of the pu leys, a brake for one of the pulleys, a positive stop for the shaft, a finger engaging with the cam, and mechanism controlled by the movements of the finger for actuating the belt-shifter, the brake and stop.

25. In a stop motion, the combination with a driven shaft and a cam moving in time therewith, means for rotating the shaft, a projection on the shaft, a lever having a notch adapted to engage with the projection and form a positive stop for the shaft, a finger connected to the lever, the end of the finger having steps, and a finger controlled by the cam and adapted to engage with each of the said steps.

26. In a stop motion, the combination with a driven shaft and a cam rotating in time therewith, two pulleys adapted to drive the driven shaft at different rates of s eed, a

belt adapted to engage with one or 0th of said pulleys, a beltshifter, a finger connected to and controlling the movements of the beltshifter, one end of the finger being stepped, and a second finger engaging with such ste ped portion of the first finger and contro led by the cam and means for positively stopping the shaft.

27. In a stop-motion, the combination .with a driven shaft and a cam rotating in time therewith, of two ulleys, gearing interposed between the pn leys and the shaft, a belt, meansL for causing the belt to enga e with one or 'both of said pulleys to positive y drive the shaft, the said means comprising a belt 'shifter, a projection turning with the shaft, a lever having a notch ada ted to engage with the said-projection and orrn aposi- .tive stop for the shaft, a finger connected to the lever, the ends of the said finger being i stepped, connections between the fingerand the belt-shifter, a second finger engaging with the steps, and connections between the sec-Y ond finger and the cam for controlling the position of the former.

28. In a stop motion, the combination with a' driven shaft-and a cam rotating 111 'time therewith, of twopulleys connected to the shaft, gearing between the pulleys and the shaft, and a belt adapted to engage w th one or both of said pulleys to positively drive the shaft, a lever engaging with the belt for the purpose of shifting it, the said lever having a slot, a pin engaging with the slot, a finger connected to the pin, the end of said finger being stepped, a second finger engaging with the stepped portion, and means actuated by the cam for moving the second finger and means for positively stopping the shaft.

29. In a stop motion, the R comblnation with a driven shaft and a cam moving in t1 rne therewith, two pulleys on the shaft gearing between the pulleys and the shaft, a belt adapted toengage with one or both of said pulleys to positively drive the shaft, a lever engaging with the belt and adapted to slnft it, the said lever having acam-slot, a pro ection on the shaft, a lever having a notch adapted to engage with the projection and form a positive stop for the shaft, a ger connected to' the lever for the purpose of moving it, a pin connected to the finger and engaging with the cam-slot, the face of said finger being stepped, a second finger engaging with the stepped portion and connectlons between the second fin er and the cam.

30. In a stop -mot1on, the combination with a shaft, two pulleys thereon, gearing between the pulleys and the shaft, and means for rotating one or both of said pulleys, a brake enga ing with one of said pulleys and adapted to lock it against rotation, a projection on the shaft, and a-lever having a notch adapted to engage with the projection and I form a positive stop for the shaft, the said le ver carrying means for applying the brake.

31. In a stop -motion, the combination with a shaft and a pulley, a projection on the shaft, and a lever having a notch and adapted to engage with the projection, the said lever carrying means for applying the brake.

32. In a stop motion, the combination with a shaft, a pulley thereon, a brake for preventing rotation of the pulley, a member connected to the brake, and having a bent portion, a projection on the shaft, a lever having a notch adapted to engage with the projection, and a pin carried by the lever and adapted to engage with the bent portion of the member for applying the brake.

33. In a stop -motion, the combination with a shaft, a cam rotating in time therewith, a projection on the shaft, a sleeve 01 the shaft rotating therewith and carrying a large and a small pinion, two pulleys loosely journaled'on the shaft, one of said pulleys carrying a pinion engaging with the larger pinion and'the other of said pulleys carryingv shaft and form a positive step for the shaft,

a brake adapted to engage with one of said pulleys to prevent its rotation, a spring carried by the brake, the said spring having an angular extremity, a pin carried by the lever and adapted to enga e with the spring for applying the brake, a ever engaging with the belt and adapted to shift it, the sald lever having a earn-slot, a finger conneeted to and actuating the first lever, a pin the stepped portion of the first finger, a third finger engaging with. the 0am, means for disengaging the first finger from the second finger, and a spring for engaging the two fingers together; i

This specification signed and witnessed this 25th day of May, 1905.

WILLIAM EDWARD GOODYEAR.

Witnesses:

L oNARn H. DYER, JAMEs D, WILLIAMS. 

